CN220186839U - Device for preventing and controlling high-temperature corrosion of ash cooling hopper - Google Patents
Device for preventing and controlling high-temperature corrosion of ash cooling hopper Download PDFInfo
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- CN220186839U CN220186839U CN202321636701.5U CN202321636701U CN220186839U CN 220186839 U CN220186839 U CN 220186839U CN 202321636701 U CN202321636701 U CN 202321636701U CN 220186839 U CN220186839 U CN 220186839U
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- 238000005260 corrosion Methods 0.000 title claims abstract description 30
- 230000007797 corrosion Effects 0.000 title claims abstract description 30
- 238000001816 cooling Methods 0.000 title claims description 46
- 238000005070 sampling Methods 0.000 claims abstract description 61
- 238000001514 detection method Methods 0.000 claims abstract description 54
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 22
- 239000001301 oxygen Substances 0.000 claims abstract description 22
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 19
- 239000000779 smoke Substances 0.000 claims abstract description 9
- 239000000523 sample Substances 0.000 claims description 57
- 239000007789 gas Substances 0.000 claims description 39
- 239000003546 flue gas Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000428 dust Substances 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 9
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- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000007921 spray Substances 0.000 abstract description 3
- 239000002956 ash Substances 0.000 description 38
- 230000000875 corresponding effect Effects 0.000 description 22
- 230000001276 controlling effect Effects 0.000 description 10
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- 239000003245 coal Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
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- 238000011010 flushing procedure Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a device for preventing and controlling high-temperature corrosion of a cold ash bucket, which belongs to the technical field of coal-fired boilers and comprises a detection assembly, wherein the detection assembly comprises a plurality of sampling elements, the cold ash bucket is provided with a plurality of water-cooled wall areas, each water-cooled wall area is provided with a sampling element for extracting the smoke atmosphere of the near wall surface of the water-cooled wall area, each sampling element is connected with a detection element, each detection element is used for detecting the concentration of carbon monoxide and the concentration of oxygen in the smoke atmosphere of the near wall surface of the corresponding water-cooled wall area, each corner of the cold ash bucket, which is connected with a furnace wall, is provided with a bottom supporting air nozzle, the bottom supporting air nozzle is provided with a control element corresponding to the bottom supporting air nozzle, and the control element controls the bottom supporting air nozzle to spray the bottom air quantity of the near wall surface of the water-cooled wall area according to the concentration of carbon monoxide and the concentration of oxygen detected by the detection element corresponding to the control element; according to the scheme, the atmosphere near the wall surface is judged in advance, the bottom air quantity is controlled according to the concentration of oxygen and carbon monoxide in the atmosphere, and the problem of high-temperature corrosion of the water-cooled wall in the area can be prevented and treated in a targeted manner.
Description
Technical Field
The utility model relates to the technical field of coal-fired boilers, in particular to a device for preventing and controlling high-temperature corrosion of a cold ash bucket.
Background
In the operation process of the coal-fired boiler, as the coal price is high, mixed coal blending combustion is a problem facing each large power plant, the fineness and volatile matters of coal powder sprayed out of a combustor are greatly different, the economic fineness of the coal type to be burned is not up to standard, the fineness of the lower-layer ground coal powder is coarser, the coal powder flash is more easily caused to brush walls and deposit in a cold ash bucket area, and the coal powder is accumulated in the cold ash bucket to generate secondary combustion, so that the area forms high Wen Queyang, high CO and high H 2 And the atmosphere of S concentration causes the high-temperature corrosion condition of the water-cooled wall with large area of the ash cooling hopper.
In the prior art, as disclosed in application number CN202021670349.3, an adherence air system for preventing corrosion of a water-cooling wall of a ash cooling hopper of a coal-fired boiler is proposed, heated compressed air is sprayed to the water-cooling wall surface of the ash cooling hopper, an air film is formed in a region near the wall surface of the ash cooling hopper to prevent corrosion of the water-cooling wall of the ash cooling hopper, but the atmosphere of the water-cooling wall surface of the ash cooling hopper is not detected before and after air is sprayed, and whether the near wall surface has formed high Wen Queyang, high CO and high H cannot be judged 2 S concentration atmosphere, directly coarsely spraying compressed air can cause resource waste, the effect of pertinently preventing and controlling high-temperature corrosion of the water-cooled wall is not achieved, the quantity of sprayed hot air cannot be controlled, the combustion efficiency of the boiler is easily affected, and the operation safety and economy of the boiler are reduced.
Disclosure of Invention
In view of the foregoing drawbacks or shortcomings of the prior art, the present utility model is directed to a device for controlling high temperature corrosion of a cold ash bucket, comprising:
the detection assembly comprises a plurality of sampling elements, the ash cooling hopper is provided with a plurality of water-cooling wall areas, at least one sampling element is arranged in each water-cooling wall area, the sampling elements are used for extracting the smoke atmosphere of the wall surface close to the water-cooling wall area, each sampling element is connected with the corresponding detection element through a sample gas pipeline, and each detection element is used for detecting the concentration of carbon monoxide and the concentration of oxygen in the smoke atmosphere of the wall surface close to the water-cooling wall area corresponding to the detection element;
a plurality of control elements, each of the control elements having the detection element corresponding thereto; and bottom supporting air nozzles are arranged at the corners of the cold ash hopper, which are connected with the furnace wall, and are provided with control elements corresponding to the bottom supporting air nozzles, and the control elements control the bottom supporting air quantity and the over-fire air opening of the water cooling wall area near wall corresponding to the detection elements according to the carbon monoxide concentration and the oxygen concentration detected by the detection elements corresponding to the control elements.
According to the technical scheme provided by the utility model, the control element is an electromagnetic valve; each bottom supporting air nozzle is communicated with a bottom supporting air branch pipe, the bottom supporting air branch pipe is communicated with a hot secondary air parent pipe, the hot secondary air parent pipe outputs hot air, and the electromagnetic valve is used for controlling the hot air quantity flowing to the bottom supporting air nozzle according to the concentration of carbon monoxide and the concentration of oxygen.
According to the technical scheme provided by the utility model, the end, far away from the sampling element, of the sample gas pipeline is provided with the filtering element, and the smoke atmosphere flowing through the sample gas pipeline enters the detection element after the salt components are filtered by the filtering element.
According to the technical scheme provided by the utility model, the end, far away from the sampling element, of the sample gas pipeline is also provided with a condensing element, and the flue gas atmosphere filtered by the filtering element flows through the condensing element to remove moisture and then enters the detecting element.
According to the technical scheme provided by the utility model, the sampling element comprises probe sampling pipes, the probe sampling pipes are arranged in each water-cooled wall area through the water-cooled wall allowing pipes and the water-cooled wall boxes, and the probe sampling pipes are communicated with the sampling pipelines.
According to the technical scheme provided by the utility model, the probe sampling tube and the sample gas pipeline are internally provided with the heat tracing component, and the heat tracing component is used for preventing flue gas condensation in the whole-course gas circuit.
According to the technical scheme provided by the utility model, the detection assembly further comprises an air blowing element, wherein the air blowing element is used for back blowing compressed air, and the blown compressed air prevents dust from blocking the probe sampling tube and the sample gas pipeline.
According to the technical scheme provided by the utility model, the end part of the probe sampling tube, which is far away from the sample gas pipeline, is provided with the dust removing element, and the dust removing element is used for preventing dust from entering the probe sampling tube.
According to the technical scheme provided by the utility model, the detection element comprises an electrochemical sensor or an infrared sensor, and the electrochemical sensor or the infrared sensor transmits a concentration signal of carbon monoxide and oxygen to the electromagnetic valve.
According to the technical scheme provided by the utility model, the bottom supporting air nozzles are symmetrically arranged along the first direction and are arranged at the middle-layer burner area, the upper-layer burner area and the reduction area between the upper-layer burner and the over-fire air along the second direction, and the first direction is perpendicular to the second direction.
In summary, the utility model provides a device for preventing and treating high-temperature corrosion of a cold ash bucket, comprising a detection assembly, wherein the detection assembly comprises a plurality of sampling elements, the cold ash bucket is provided with a plurality of water-cooled wall areas, each water-cooled wall area is provided with a sampling element for extracting the flue gas atmosphere of the near wall surface of the water-cooled wall area, each sampling element is connected with a corresponding detection element through a sample gas pipeline, each detection element is used for detecting the carbon monoxide concentration and the oxygen concentration in the flue gas atmosphere of the near wall surface of the water-cooled wall area corresponding to the detection element, each detection element is provided with a corresponding control element, each corner of the cold ash bucket, which is connected with a furnace wall, is provided with a bottom air supporting nozzle, each bottom air supporting nozzle is provided with a corresponding control element, and the control element controls the bottom air supporting nozzle to spray water corresponding to the detection element according to the carbon monoxide concentration and the oxygen concentration detected by the corresponding detection elementThe bottom supporting air quantity near the wall surface of the cold wall area; the proposal judges whether the near wall surface has formed high Wen Queyang, high CO and high H in advance 2 And the air quantity of the bottom supporting air entering the near wall surface is controlled according to the concentration of oxygen and carbon monoxide in the near wall surface atmosphere, the air quantity can pointedly prevent and treat the problem of high-temperature corrosion of the water-cooled wall in the area, resources are saved, the air quantity is controllable, the combustion of the boiler is not influenced, the safety and the economical efficiency of the operation of the boiler are improved, and the service life of the boiler is prolonged.
Drawings
FIG. 1 is a side view of a device for preventing and controlling high-temperature corrosion of a cold ash bucket provided by the utility model;
FIG. 2 is a front view of the device for preventing and controlling the high-temperature corrosion of the cold ash bucket provided by the utility model;
FIG. 3 is a top view of the device for preventing and controlling the high-temperature corrosion of the cold ash bucket.
The text labels in the figures are expressed as:
1. a flue gas filtering and condensing module; 2. a detection element; 3. a sampling element; 4. a hot secondary air duct; 5. a bottom supporting wind branch pipe; 6. a control element; 7. a bottom supporting wind nozzle; 8. a sample gas line; 9. and (5) cooling the ash bucket.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
As mentioned in the background art, in order to solve the problems in the prior art, the present utility model provides a device for preventing and treating high temperature corrosion of a cold ash bucket, please refer to fig. 1, 2 and 3, which includes:
the detection assembly comprises a plurality of sampling elements 3, wherein the ash cooling hopper 9 is provided with a plurality of water-cooled wall areas, at least one sampling element 3 is arranged in each water-cooled wall area, the sampling elements 3 are used for extracting the flue gas atmosphere of the near wall surface of the water-cooled wall area, each sampling element 3 is connected with the corresponding detection element 2 through a sample gas pipeline 8, and each detection element 2 is used for detecting the concentration of carbon monoxide and the concentration of oxygen in the flue gas atmosphere of the near wall surface of the corresponding water-cooled wall area;
a plurality of control elements 6, each control element 6 having the detection element 2 corresponding thereto; and each corner of the ash cooling hopper 9 connected with the furnace wall is provided with a bottom supporting air nozzle 7, the bottom supporting air nozzle 7 is provided with a control element 6 corresponding to the bottom supporting air nozzle 7, and the control element 6 controls the bottom supporting air quantity and the over-fire air opening of the bottom supporting air nozzle 7 to be sprayed to the near wall surface of the water cooling wall area corresponding to the detection element 2 according to the carbon monoxide concentration and the oxygen concentration detected by the detection element 2 corresponding to the control element 6.
At present, the technical modes for reducing the high-temperature corrosion of the boiler ash cooling hopper in the industry mainly comprise the following three modes:
first, boundary wind is set. The method is that about 5% of air quantity is extracted from secondary air as boundary air, and the air quantity gradually climbs upwards from two furnace walls at the bottom of the hearth. However, this form of boundary wind gradually dissipates during the bottom climb, and thus does not allow an oxidizing atmosphere to be achieved on the wall of the water wall.
Secondly, a plurality of side lower nozzles are arranged in the boiler ash cooling hopper area. In order to achieve penetrability of jet flow of the nozzle, the total air quantity occupied is more than 10%, the air quantity for combustion is greatly influenced, the carbon content of fly ash of the boiler is easily increased, and the combustion efficiency of the boiler is reduced. Meanwhile, the mode can not realize uniform protection of the wall surface of the water-cooled wall, and the low-nitrogen effect is affected.
Thirdly, the water-cooled wall is provided with holes for air leakage. The water cooling wall is directly provided with holes, and the cold air outside the furnace is directly sucked into the ash cooling hopper from the holes of the water cooling wall by utilizing the negative pressure of the hearth. However, through years of practical application, the mode finds that the air leakage is directly perpendicular to the water-cooled wall and enters the hearth, and the air curtain cannot be formed on the water-cooled wall surface at all. Meanwhile, the air quantity of the air leakage cannot be controlled, so that the combustion efficiency of the boiler is reduced, and the operation economy of the boiler is affected.
The mode has disadvantages rather than an effective control method, and compared with the scheme, the scheme has great advantages, the whole system not only can effectively control the high-temperature corrosion and coking of the ash cooling hopper, but also has simple and reasonable structure, and only needs to increase a plurality of bottom supporting air nozzles, pipelines and a small amount of CO/O 2 The on-line monitoring equipment is convenient to reform and implement, and has remarkable technical and economic benefits.
Specifically, the bottom supporting wind nozzle 7 is a circular wind nozzle (typically in a bell-jar structure, which can be optimized according to the actual situation of the site), and is vertically or obliquely installed at the corner where the furnace wall is connected with the ash cooling hopper 9 according to the actual situation of the boiler.
Specifically, in order to improve accuracy, a plurality of detection points may be provided, and the sampling element 3 is provided at each detection point.
In particular, due to H 2 S concentration and CO concentration are positively correlated, so that the CO and H in the boiler can be well reflected by only detecting the CO concentration 2 S concentration, so as to make corresponding air quantity regulation.
Specifically, the ash cooling hopper 9 has a plurality of water-cooled wall areas, each water-cooled wall area has a corresponding sampling element 3, a detection element 2, a control element 6 and a bottom air nozzle 7, the sampling element 3 takes out the flue gas atmosphere sample gas in the area, the sample gas is conveyed to the detection element 2 through the sample gas pipeline 8, and the detection element 2 detects the near-wall surface CO/O of the area 2 The concentration is fed back to the control element 6, and the control element 6 is based on the near wall CO/O of the area 2 The concentration, the air quantity of the bottom supporting air and the air quantity of the over-fire air are regulated, and the specific regulation strategy is as follows:
when the concentration of CO on the wall surface near the water cooling wall area of the ash cooling hopper 9 is larger than or equal to a first preset threshold value and the concentration of oxygen is smaller than the first preset threshold value, carrying out bottom supporting air quantity adjustment through the control element 6;
and when the CO concentration of the wall surface near the water cooling wall area of the ash cooling hopper 9 is larger than or equal to a second preset threshold value and the oxygen concentration is smaller than the second preset threshold value, reducing the air quantity of the over-fire air.
The working principle of the regulation strategy is as follows: the improvement of the concentration of CO by the control element 6 in the area is far less than the reduction of the concentration of CO by the reduction of the amount of the over-fire air, but the influence of the adjustment of the amount of the over-fire air on the normal operation of the boiler is far lower than that of the adjustment of the amount of the over-fire air, so the adjustment of the amount of the over-fire air is carried out firstly and then the adjustment of the amount of the over-fire air is carried out.
Specifically, the sampling element 3 may sample in real time, and send the sampled sample to the detecting element 2, and the signal output of the concentration of the sample gas component detected by the detecting element 2 is continuous, so that the change condition of the concentration of the sample gas can be continuously captured in real time, and the control element 6 may dynamically adjust the air volume in real time by feeding back the signal to the control element 6 in real time.
The working principle of the scheme is as follows: CO/O based on real-time feedback 2 The concentration signal controls the bottom supporting air nozzle 7 to spray corresponding amount of bottom supporting air to form a layer of air curtain with certain rigidity at the corresponding position of the water-cooled wall through the control element 6, so that the flushing of flame jet flow of the burner to the water-cooled wall near the position of the ash cooling hopper 9 is resisted, and the direct flushing abrasion to the water-cooled wall is reduced; meanwhile, the introduced air quantity can supplement oxygen into the hearth, so that the reducing atmosphere of the water-cooling wall area of the ash cooling hopper 9 is improved, and the high-temperature corrosion degree of the water-cooling wall is reduced.
In a preferred embodiment, the control element 6 is a solenoid valve; each bottom supporting air nozzle 7 is communicated with a bottom supporting air branch pipe 5, the bottom supporting air branch pipe 5 is communicated with a hot secondary air mother pipe 4, the hot secondary air mother pipe 4 outputs hot air, and the electromagnetic valve is used for controlling the hot air quantity flowing to the bottom supporting air nozzle 7 according to the concentration of carbon monoxide and the concentration of oxygen.
Referring to fig. 3, the hot air output by the hot secondary air pipe 4 enters into each bottom supporting air branch pipe 5, and the hot secondary air pipe 4 can be a hot primary air pipe, and then is sprayed into the ash cooling hopper 9 along a design angle through each bottom supporting air nozzle 7, so that an air curtain is formed on the ash cooling hopper 9 of the boiler, and the air curtain resists the scouring of flame jet flow of the burner at the lowest layer of the boiler to the water cooling wall, thereby reducing direct scouring abrasion to the water cooling wall; meanwhile, the introduced hot primary air or secondary air can supplement oxygen into the cold ash hopper 9 so as to improve the reducing atmosphere of the water cooling wall area of the boiler cold ash hopper 9 and reduce the high-temperature corrosion degree of the water cooling wall. In addition, the detecting element 2 can measure the wall surface atmosphere in real time, and control the opening degree of each electromagnetic valve, thereby controlling the magnitude of the bottom supporting air quantity.
Specifically, the air source used by the bottom supporting air nozzle 7 adopts hot primary air or hot secondary air, the air quantity accounts for 0.5% -1% of the total air quantity, and the normal combustion of the boiler is not affected.
In a preferred embodiment, the end of the sample gas pipeline 8 away from the sampling element is provided with a filter element, and the flue gas atmosphere flowing through the sample gas pipeline 8 is filtered by the filter element for salt components and then enters the detection element 2.
Specifically, the maintenance period of the system can be prolonged after the sample gas filters the salt components.
In a preferred embodiment, the end of the sample gas pipeline 8 away from the sampling element 3 is further provided with a condensing element, and the flue gas atmosphere filtered by the filtering element flows through the condensing element to remove moisture and then enters the detecting element 2.
Specifically, the filter element and the condensing element can be integrated into a smoke filtering and condensing module 1, the smoke is directly filtered and condensed and then is transmitted to the detecting element 2 for detection, and the smoke filtering and condensing module 1 is arranged outside the ash cooling hopper 9, so that the damage to the element caused by the bad environment is avoided.
Specifically, moisture interference in the measuring process can be effectively avoided by removing moisture from the sample gas, and the detection accuracy is improved.
In a preferred embodiment, the sampling element 3 comprises a probe sampling tube mounted to each of the water wall sections by a water wall let tube and a water wall box, the probe sampling tube being in communication with the sample gas line 8.
Specifically, the pipe diameter of each probe sampling pipe is 76mm, and the length is designed according to the external heat preservation of the hearth and the actual conditions of the site.
In a preferred embodiment, a heat tracing assembly is arranged in the probe sampling tube and the sample gas pipeline 8, and the heat tracing assembly is used for preventing flue gas condensation in a whole-course gas path.
Specifically, the sampling element 3 relies on the heat tracing component, and the whole-course gas circuit heat tracing technology is utilized to prevent dust from blocking the filter element and the sample gas pipeline 8 caused by flue gas condensation.
In a preferred embodiment, the detection assembly further comprises an air blowing element for back blowing compressed air, the blown compressed air preventing dust from blocking the probe sampling tube and the sample gas line 8.
Specifically, the sampling element 3 relies on the blowing element, and the compressed air back blowing technology is utilized, so that dust blocking of the probe and the 8 paths of the sample gas pipeline can be effectively avoided.
In a preferred embodiment, the end of the probe sampling tube remote from the sample gas line 8 is provided with a dust removal element for preventing dust from entering the probe sampling tube.
Specifically, the sampling element 3 is supported by a dust removing element, and a dust separation technology is adopted, so that pollutants such as dust entering the probe sampling tube can be effectively reduced, and the service cycle is prolonged.
In a preferred embodiment, the detection element 2 comprises an electrochemical sensor or an infrared sensor that transmits a concentration signal of carbon monoxide and oxygen to the solenoid valve.
Specifically, CO/O 2 When the detection element 2 selects the infrared sensor of the high-power light source, the constant temperature control technology is adopted, so that the influence of the environment on the instrument can be effectively reduced, and meanwhile, the atmospheric pressure compensation algorithm is adopted, so that the influence of the atmospheric pressure change on the instrument measurement is reduced.
Specifically, CO/O 2 The detection element 2 selects a high-sensitivity long-life double-electrochemical sensor alternative working technology, so that sensor poisoning can be effectively avoided; the unique sensor sample gas detection technology can realize undisturbed switching in the detection process.
In a preferred embodiment, each of the under-wind jets 7 is symmetrically arranged in a first direction and in a second direction, the first direction being perpendicular to the second direction, at the middle and upper burner regions and at the reduction region between the upper burner and the over-fire wind.
Specifically, the first direction is the depth direction of the boiler, and the second direction is the height direction of the boiler.
Referring to fig. 2, the number of the bottom wind spouts 7 is arranged according to the actual situation of the boiler.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. The foregoing is merely illustrative of the preferred embodiments of this utility model, and it is noted that there is objectively no limit to the specific structure disclosed herein, since numerous modifications, adaptations and variations can be made by those skilled in the art without departing from the principles of the utility model, and the above-described features can be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the inventive concepts and aspects to other applications without modification, are contemplated as falling within the scope of the present utility model.
Claims (10)
1. A device for controlling high temperature corrosion of a cold ash bucket, comprising:
the detection assembly comprises a plurality of sampling elements (3), the cold ash hopper (9) is provided with a plurality of water-cooled wall areas, at least one sampling element (3) is arranged in each water-cooled wall area, the sampling elements (3) are used for extracting the flue gas atmosphere of the near wall surface of the water-cooled wall area, each sampling element (3) is connected with the corresponding detection element (2) through a sample gas pipeline (8), and each detection element (2) is used for detecting the concentration of carbon monoxide and the concentration of oxygen in the flue gas atmosphere of the near wall surface of the water-cooled wall area corresponding to the detection element;
-a plurality of control elements (6), each control element (6) having a corresponding detection element (2); the cold ash hopper (9) is provided with bottom supporting air nozzles (7) at each corner connected with the furnace wall, the bottom supporting air nozzles (7) are provided with control elements (6) corresponding to the bottom supporting air nozzles, and the control elements (6) control bottom supporting air quantity and over-fire air opening of the near-wall surface of the water cooling wall area corresponding to the detection elements (2) according to the carbon monoxide concentration and the oxygen concentration detected by the detection elements (2) corresponding to the control elements.
2. The device for controlling high-temperature corrosion of a cold ash bucket according to claim 1, characterized in that the control element (6) is a solenoid valve; each bottom supporting air nozzle (7) is communicated with a bottom supporting air branch pipe (5), the bottom supporting air branch pipe (5) is communicated with a hot secondary air parent pipe (4), the hot secondary air parent pipe (4) outputs hot air, and the electromagnetic valve is used for controlling the amount of hot air flowing to the bottom supporting air nozzle (7) according to the concentration of carbon monoxide and the concentration of oxygen.
3. The device for preventing and treating high-temperature corrosion of a cold ash bucket according to claim 2, wherein a filter element is arranged at the end of the sample gas pipeline (8) far away from the sampling element (3), and the smoke atmosphere flowing through the sample gas pipeline (8) is filtered by the filter element for salt components and then enters the detection element (2).
4. A device for preventing and treating high-temperature corrosion of a cold ash bucket according to claim 3, wherein a condensing element is further arranged at the end of the sample gas pipeline (8) far away from the sampling element (3), and the flue gas atmosphere filtered by the filtering element flows through the condensing element to remove moisture and then enters the detecting element (2).
5. The device for preventing and treating high-temperature corrosion of a cold ash bucket according to claim 1, wherein the sampling element (3) comprises a probe sampling tube, the probe sampling tube is arranged in each water-cooled wall area through a water-cooled wall let tube and a water-cooled wall box, and the probe sampling tube is communicated with the sampling gas pipeline (8).
6. The device for preventing and controlling high-temperature corrosion of a cold ash bucket according to claim 5, wherein a heat tracing component is arranged in the probe sampling tube and the sampling gas pipeline (8), and the heat tracing component is used for preventing flue gas condensation in a whole-course gas circuit.
7. The device for controlling hot corrosion of a cold ash bucket according to claim 5, characterized in that the detection assembly further comprises a blowing element for back blowing compressed air, which blown out prevents dust from blocking the probe sampling tube and the sample gas line (8).
8. The device for preventing and controlling high-temperature corrosion of a cold ash bucket according to claim 5, characterized in that the end of the probe sampling tube, which is far away from the sampling gas pipeline (8), is provided with a dust removing element for preventing dust from entering the probe sampling tube.
9. The device for controlling hot corrosion of a cold ash bucket according to claim 2, characterized in that the detection element (2) comprises an electrochemical sensor or an infrared sensor, which transmits a concentration signal of carbon monoxide and oxygen to the solenoid valve.
10. The device for controlling hot corrosion of cold ash hoppers according to claim 1, characterised in that each of said bottom wind jets (7) is arranged symmetrically along a first direction and along a second direction, said first direction being perpendicular to said second direction, at the middle and upper burner zones and at the reduction zone between the upper burner and the overfire air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321636701.5U CN220186839U (en) | 2023-06-26 | 2023-06-26 | Device for preventing and controlling high-temperature corrosion of ash cooling hopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321636701.5U CN220186839U (en) | 2023-06-26 | 2023-06-26 | Device for preventing and controlling high-temperature corrosion of ash cooling hopper |
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| CN220186839U true CN220186839U (en) | 2023-12-15 |
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| CN202321636701.5U Active CN220186839U (en) | 2023-06-26 | 2023-06-26 | Device for preventing and controlling high-temperature corrosion of ash cooling hopper |
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| CN (1) | CN220186839U (en) |
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2023
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